day no. 15,023: Jesus Christ, God's only begotten, conceived by the Holy Spirit

This is a core belief of Christianity. It is embedded in the most ancient of our creeds.

The Apostles Creed

I believe in God the Father Almighty, Maker of heaven and earth, and in Jesus Christ, his only begotten Son, our Lord.  He was conceived by the Holy Ghost, and born of the virgin, Mary.  He suffered under Pontius Pilate, was crucified, died, and was buried.  He descended into Hades.  On the third day He rose again from the dead, ascended into Heaven, and sits at the right hand of God the Father Almighty; from thence He will come to judge the living and the dead.  I believe in the Holy Ghost, the holy catholic Church, the communion of saints, the forgiveness of sins, the resurrection of the body, and the life everlasting. Amen.

Christianity asserts what Luke says plainly. God, the Holy Spirit, impregnated Mary

Luke 1:26-38

In the sixth month the angel Gabriel was sent from God to a city of Galilee named Nazareth, 27 to a virgin betrothed to a man whose name was Joseph, of the house of David. And the virgin's name was Mary. 28 And he came to her and said, “Greetings, O favored one, the Lord is with you!” 29 But she was greatly troubled at the saying, and tried to discern what sort of greeting this might be. 30 And the angel said to her, “Do not be afraid, Mary, for you have found favor with God. 31 And behold, you will conceive in your womb and bear a son, and you shall call his name Jesus. 32 He will be great and will be called the Son of the Most High. And the Lord God will give to him the throne of his father David, 33 and he will reign over the house of Jacob forever, and of his kingdom there will be no end.”

34 And Mary said to the angel, “How will this be, since I am a virgin?”

35 And the angel answered her, “The Holy Spirit will come upon you, and the power of the Most High will overshadow you; therefore the child to be born will be called holy—the Son of God. 36 And behold, your relative Elizabeth in her old age has also conceived a son, and this is the sixth month with her who was called barren. 37 For nothing will be impossible with God.” 38 And Mary said, “Behold, I am the servant of the Lord; let it be to me according to your word.” And the angel departed from her.

Gabriel tells Mary she is going to have a child. She, a virgin, asks the obvious question, "How?" He responds that the Holy Spirit will come upon her and impregnate her. The seed will be divine, not human. The egg will be human, hers. Thus fulfiling God's promise from the Garden before He sent Adam and Eve out...

Genesis 3:15

I will put enmity between you and the woman,
    and between your offspring and her offspring;
he shall bruise your head,
    and you shall bruise his heel.”

Also, notice that Gabriel said, "therefore the child to be born will be called holy—the Son of God." Why will the child be holy, perfect, blameless, without sin, the very one and only begotten Son of God? Because "The Holy Spirit will come upon you, and the power of the Most High will overshadow you." In other words, the reason the Son will be God is the Dad is God. The second member of the Trinity will descend and take upon Himself flesh.

John 1:1, 14 
In the beginning was the Word, and the Word was with God, and the Word was God...And the Word became flesh and dwelt among us, and we have seen his glory, glory as of the only Son from the Father, full of grace and truth.

Jesus being the seed of the woman implanted by the Holy Spirit so that He would be the son of Man (born of a human egg) and the Son of God (born of divine seed) is a statement about male headship.

How so, you ask? Great question!

Adam plunged humanity into the Fall, not Eve. Eve was deceived first by the serpent and then Adam listened to his wife. But Eve did not have authority to send humanity headlong into hereditary sin passed down incessantly generation to generation. Why? Because inheritance does not go through the helper, it goes through the head. Adam was the head of the household. He could have repented on behalf of his wife before God even after her eating of the fruit presumably and kept himself pure and substitute himself as an acceptable, perfect sacrifice on her behalf. This is precisely what Jesus would end up doing.

The reason it is important that He was born of a human woman was so that he would be human. The reason it is important His dad was divine means He did not inherit the sin of Adam... because inheritance goes through the man, not the woman. Families receive their identity through their dads, including their sin nature and since every person ever born since Adam and Eve have been conceived by a human father, the sin of Adam and death along with it have reigned.

1 Corinthians 11:8-9, 11-12
For man was not made from woman, but woman from man. 9 Neither was man created for woman, but woman for man... Nevertheless, in the Lord woman is not independent of man nor man of woman;  for as woman was made from man, so man is now born of woman. And all things are from God.

Romans 5:12-14
Therefore, just as sin came into the world through one man, and death through sin, and so death spread to all men because all sinned— for sin indeed was in the world before the law was given, but sin is not counted where there is no law. Yet death reigned from Adam to Moses, even over those whose sinning was not like the transgression of Adam, who was a type of the one who was to come.

So all that to say, if you don't understand male headship, you don't understand God's story of creation, Fall or redemption. God made man first and made him the head. Man, as the head of humanity, lead all humanity into sin, death and destruction. Through the second Adam, the son of man and Son of God, Jesus redeemed humanity by substituting Himself in humanity's place, as her Head, with the authority to take upon Himself all that was hers, claim responsibility for her, die in her place and rise again to set her free forever.

And that, my friend... is Good News!